A　high-power　2.0　μm　thulium-doped　ultrafast　all-fiber　master　oscillator　power　amplifier　(MOPA)　is　developed.　The　seed　source　is　a　thulium-doped　double-clad　single-mode　fiber　laser　passively　mode-locked　by　a　semiconductor　saturable　absorber　mirror　(SESAM).　It　produces　about　15　mW　average　output　power　with　10.4　MHz　repetition　rate.　A　thulium-doped　all-fiber　amplifier　is　used　to　boost　average　output　power　to　1.1　W,　corresponding　to　the　single　pulse　energy　of　105　nJ.　The　pulse　width　is　measured　to　be　9　ps,　the　center　wavelength　and　the　spectral　bandwidth　are　1963　nm　and　0.5　nm　respectively.　To　the　best　of　our　knowledge,　this　is　the　first　report　for　all-fiber　thulium-doped　ultrafast　fiber　laser　with　watts-level　average　output　power.